Cash App has begun a phased rollout of USD Coin (USDC) payments, enabling nearly 60 million U.S. users to deposit and withdraw the stablecoin. Currently, about 25% of Cash App's user base can access this feature, with full availability expected within a week. This integration allows users to move USDC between external self-custodial wallets and their Cash App dollar balance, facilitating everyday transfers and commerce. The new feature supports USDC transactions across Solana, Ethereum, Polygon, and Arbitrum blockchains, offering users a choice between high-throughput, low-fee networks and the established Ethereum mainnet. Cash App emphasizes that USDC transfers are irreversible, highlighting the importance of user education as it introduces mainstream users to crypto-native infrastructure. This move aligns with Block's strategy to integrate stablecoins for payments, complementing its focus on Bitcoin.